There is an error. It should be: 'I assume the presidency' In other words, Ford was taking on the role of president. I actually saw him - I played in our High School band, which was chosen to play for an event he spoke at.

Hi To assume the presidency- take over the role of President/ become President. Under extraordinary circumstances- not under normal circumstances Never before experienced by Americans- it is the first time American´s experienced these circumstances. Kind regards Nicci